This Saturday, June 16th, from 2-4pm Toys R Us will be having an in-store event for the launch of the new Lego Super Hero sets. Each child can make their own Batman or Superman shield to bring home. Details here.
We went to a Toys R Us Ninjago event a year or so ago and while the event was pretty small, my boys had fun with and had been asking when there would be another. Definitely worth checking out, even if it is only a quick 15 minute pitstop.
Update 6/14/2012: Toys R Us has sent out an email for the event which including a photo of the shields. Looks like a base plate with small Lego pieces added to make the logo for Superman or Batman. Fun little project